.wrapper{
    position:relative; /* important(so we can absolutely position the description div */ 
}
.description{
    position:absolute; /* absolute position (so we can position it where we want)*/
    bottom:0px; /* position will be on bottom */
    left:0px;
    display:block; /* hide it */
    /* styling bellow */
    background-color:black;
    font-family: 'tahoma';
    font-size:15px;
    color:white;
    width: 500px;
    opacity: 0.7
}
.description_content{
    padding:5px;
    opacity: 1
}